Type-lock of type-writing machines.



G. W. DAVIS &`J. S. DUMAS. TYPE LOCK 0F TYPB-WMTING MAGHINES. APPLICATION FILED DEG. 29, 1911.

1,054,397. Patented P91025, 1913.

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c'noacs winmx invia Nnaosrirn somnoitmrias, or wnsnroUN'r, QUEBEC,

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TYPE-wams ucHINns.

specmuon mam rima Patented Feb. 25,1913. Apiieanon mea December 2a, 191i. semi in. 688,434.

To allwhom-z'tma concern:

Be it. known t at we, GEORGEWILLIAM' Davis andJoearH SonoMcN DUMAs,f the city of Westmount, Province of Quebec, in the Dominion of Canada, both subjects of the King of Great'Britain, have' invented certain new and useful' Improvements in Locks oflType-Writing Machines; an we do hereby vdeclare that the following-is a full, clear, and exact description This invention relates particularly tothat class of typewriting machines in which is employed a horizontally swinginghty e-lock having an arm adapted when t e ock is operated to engage a part of. the' writing mechanism and prevent'the operation of the latter. and a pair of arms engagedduring the escapement-controlled fee by a part upon the carriage for the purpose of successively arrestin the carriage at two dif ferent distances om the end of the line. A key is arranged to act upon the lock to shift the same against the resistance of a spring and permit the operator to write a few more .characters after having1 been stopped by the first arm of the pair, ereto fore the second arm of the pair served as an abutment affording a iinalfstop for the carriage. When the tabulator was carelessly used or the carriage otherwise, possibly1 by 'inadvertence, allowed to run freely wit out being arrested, by' tabulator stops for in- 'stancef'itwould st rike one or the other of this pair of arms .and frequently damage the lock.

' vThe object o1 the present invention is to relieve'thelock of shocks of' this nature and at the same time permit of its use under escapementffeed conditions-to, as formerly, lock the machine successively at twoditerent distances from the end of the line.

To this end the invention consists of meanslpermitting the required movement of the loc to enable the latter to lock the machine when operated' under escapementfeed conditions, and to come into action and 'displace the lock'from the path of the member shifting it, when' the carriage moves it more than the required amount.

For full comprehension however, of our invention reference must be had tothe accompanying drawings :formingar part of this specification in which simi reference characters indicate the same parts, and wherein: j Figure 1 '-is a horizontal sectional view of the rear Ap'ortionof a typewriting machine containing our invention, the section removing the writing mechanism, typeguide late, and sufiicient parts of the machine rame and carria e to clearly show the invention and its relation to the parts of the machine with which it co-acts; Fig.

I 2 is a transverse vertical sectional view taken on liiie A A Fig. l; Fig. 3 is a detail view illustrating in perspective the type-lock plate provided with our invention; Fig. 4 is a detail perspective view illustrating the supporting plate for the free end of the locking plate.

The lock is in the main similar to the construction heretofore used, the present improvements being obtained by adding a structural feature thereto and placing a stop on the carriage-supporting frame in position to` most effectively transmit shocks exerted thereono the machineframe This lock consists o an oblong sheet-metal plate 2 slotted at one end as at 3 and having an oiset locking arm 4 'extending downwardly from a lateral extension 5 at one side of the plate a short distance from the opposite end thereof, and a' pair of angular arms 6, 7, extendn downwardly from the opposite side edge o the lateand having their ends turned beneath t e latter. The end of the plate opposite the slot 3 is reduced in width to a narrow"neck 8 formed with a diagonal finger 9. This device is slidably pivoted to one side of the under-side of ,the up er portion 10 of the machine frame by a ulcrumcrew 1-2 through the slot 3, its opposite end with finger 9 thereon being supported in sliding Acontact with the opposite side of the frame by an. offset-plate 13 fastened in lace by screw 14 and steadied in position y a lug 15 at one end envaging the face 16 of that ortion of the, rame. A pin 19 projects ownwardl from the frame within the space between t e iinger 9 and the body -of the` locking plate. The opposite end of lOl ai@ frame 'and the erm afnomuy feste in close proximity to fone side of.=then topI The function offthejspring v18is-toyield ingly retain theu locking f platez'in lnormal position 'with the Send of its body f-portion labutting andthe neck '-8 bearing against fp osition mentioned, lviz., .in closeproximity supporting frame in position 'to transmit lany shockexerted thereon to the'endstandard 5 2-of such vframe'and-through it '-to 'the base of the'main framcl of vthe machine.

During the operation of the machine, under straight writing conditions Y during which the carriage feed is controlled by the esca ement, the bell-trip 4O'engages'thearm 6 w en thel carriage comes wlthin 'a short distance of the-end of, the line, and v,the'next action of the. operator Whethernto iint va character or providea space feeds t e'carriage one space with the effect that the lock. ing arm 4 is moved just .siitiiciently` tobe placed over the boss 22 and 'as its elevation is practically equal tothat ofl the top of this boss,^the latter, andtheifeedldo'gcar rier, and consequently .the ,Writingmecha-- nism, are lo'cked. against, movement.. ,The length of thc neck 8 is slightly vrgreater than one space and accommodates the movement just mentioned. As the bell-trip ,engages the arms 6 andy-7 under escapement feed conditions, vit also st rikestliem when they carriage 1s released and allowedfto'travel under thelfull tension of the carriage-.feeding spring 60, andzin orderto prevent damage to these'arms or the lockinglplate itself,

isis4 thedila'gonal tingeru'9'isuso arraned that the increased movement of the ate, due to,the`impact,of the'bell-trip 0n-,te first or second .or, the finger ,9 to impinge u on the,y .and 4.displace the plate latere ly there leasin the bell-trip'z: and allowing.; Y. there ore the, carriage-v totx and 4"air- .reaedby he. ,copian when-:recetas the? struck' by' thecarriag'e, is obviated. l

' .What 'we claim` is as follows -'1.In a 'typewritin'g machine comprising Aa vcarriage with a trip device thereon and movable therewith,a device adapted to be engaged-by the trip device upon the carriage when'the latter nears the end of the line, and means automatically displacing the locking device from the path of the said t-rip device upon the carriage under different operating conditions.

2. A typewriting machine comprising a carriage having a trip-device thereon and movable therewith, a carriage supporting frame having acarriage-stop rigidly mounted thereon, a device for locking the machine and havin an integral member in the path'ofthe sai trip-device, such lockingdevice being adapted to be 'moved by the trip device upon the. carriage to locking position, and fmeans formed integrally with the locking device for automatically di-.iplacin'g'the said locking device and moving the said member out of the path of the tripdevice.

3. A typewriting machine comprising a main frame, a carriage having a trip-devicethereon, a carriage-supporting frame mounted upon the main frame and having a carriage-stop rigidly mounted thereon, a type-lock platevsl'otted at one end for sliding pivotal connection with the machim` fra-me and having an arm intersecting the path of the trip-device, means slidably supvportingthe'opposite end of the plate, means yieldinglyretainin'g the plate with its arm in intersecting-position, and means whereby under certain conditions the said trip-device displaces the vvarm from intersectingposition. 4. A typewritin'g machine comprising a main frame, an' operating part of the 'writingmechanism, a fcarria'g'eh'aving a tripdevicefthereo'n, a carriage-supporting frame mounted Iupon' the main frame -and having a carria ye-stop rigidi mounted thereon, a type-lloc. i plate lslotte 'at 'one tend, for sliding f'pivotal connection vwith the machine frame and having an arm intersectin .the pathv ofthe trip-device and an arm for ooking engagementg'with the operatingart of thewritug mechanism, meansg'slidabiiy supfportiiigthe opposite end 'ofthe plate, means j "yieldin'glyV vreti'niii'gytheplate .with its first 'f n'inti'iid ai'm-in -Iin'tr'sctin'gk position, and 'xnans 'whereby ander cejrti'itconditio'ns the 'said-trip-d'evic'fe displac'es'the '-m from intersecting position.

` typeWriting'` machine comprising va main 'f'rame, 'ai 'carriage having "a tri -deyvice theb, a carriage-'supporting mounted upon thelmain frame and aving a carriage-stop ri ",dly mounted thereon a type-lock plate s otted at one 'end for slid- .ing..pivotal connewtion with the machine frame and having an arm ame los i intersecting the 115e Y rigidlymounted thereon, a type-lock plate slotted at one end for sliding pivotal con-V path of the trip-device, means slidably supporting the opposite end .of the plate, means yieldingly retainingv the plate with its arm in intersecting position, and meansupon the plate and engaging a part upon the frame mam frame and having a carriage-stop rigidly mounted thereon, a type-lock plate slotted at oney end for sliding pivotal connectionA with the machine frame andl having an arm, intersecting the path of the tripdevice, means slidably supporting the opposite end of the plate, means yieldingly retaining the plate with its arm in intersecting position, and theV said plate having a cam face for engagementI with the pin projection upon the frame 'whereby under certain conditions the said trip-device displaces the arm from intersecting position.

7. A typewriting machine comprising a main frame, having apin projection, a carriage having a trip-device thereon, aV cardage-supporting ramegmountedV upon the main fra-me and having a carriage-stop nection with themachine frame andhaving an arm intersecting the path of the trip-device, means slidably supporting the `opposite end of the plate, means yieldingly retaining-the plate with its arm in intersectfing position, and the said opposite end of c the plate having a neck and a diagonal finger for' engagement 'with the pin projection 'upon the frame whereby/under certain conditions, the said trip-device dis- .places the arm from intersecting position.'

' vS. Atypevvriting machine comprising a main rame,an operating part ofthe writ- V'ing.-mechanism, a carriage having a tripdevice thereon, a carriage-supporting frame mounted upon the main frame and having a carriage-stop rigidly mounted thereon, a

type-lock plate slotted at one end for sliding pivotal connection `with the' machine frame and having an arm intersectin the 'path of the trip-device and an arm for ocking engagement with the operating part of the writing mechanism, means lidably supporting-theoppo'site end of the plate, means yieldingly retaining the late with its first mentioned. arm in intersecting position, and means upon the plate and engaging a part upon the frame whereby under certain conditions the said trip-device displaces the arm from intersecting'position.

9. A typewriting machine comprising a.

main frame, having'a pin projection, an operating part of the writing mechanism, a

carriage having a trip-device thereon, a car- A mage-supporting frame mounted` upon the mam frame and having a carriage-stop' rigidly mounted thereon, a type-lock plate slotted at, one end. for slidingpivotalconnection with the machine frame and having an arm intersecting the path of the trip-device and an arm for locking lengagement with the operating part of the Writing mechanism, means slidably supportingthe opposite end of the plate, means yieldingly retaining the plate with its first mentioned arm in intersecting position, and the said opposite end of the plate'having a neck and a diagonal linger for engagement wij-hthe pin projection upon the -framej whereby under certain conditions the said trip-device displaces the arm from intersecting position.

Montreal. Nov. 36th 1911.

In testimony whereof we have signed our 'i Copies ottla potent ina] be obtained for dv cents each, by addressing the Commissioner of Patents,

Washington, 1D.'V CQ 

